Sewer Blooper is the first boss in Super Mario Exploit. He appears in the first level of Petal Town, called Battle in the Sewers. He looks like a blooper, with a large, round head with his eyes and mouth at the top of it, and 6 long, skinny tentacles that stretch out 3 times as long as his body. He also reappears in the second level of Black Canyon in the level Sewer Blooper in the Canyon. In both appearences, he uses his tentacles to wrap himself against the pipe/canon, and uses his mouth to shoot ink at the player.